> I use this in HiTech C
>
> typedef struct Port_s
> {
>     unsigned    bit0    :1;
>     unsigned    bit1    :1;
>     unsigned    bit2    :1;
>     unsigned    bit3    :1;
>     unsigned    bit4    :1;
>     unsigned    bit5    :1;
>     unsigned    bit6    :1;
>     unsigned    bit7    :1;
> } Port_t;
>
> union
> {   unsigned char   Byte;
>     Port_t          Bits; }     PortA, PortB, PortC;
>
> and use it like this
>
> if (!PortB.Bits.bit5)
>     PortA.Byte = 0xAA;

I use something similar on occasion, but usually not for the ports. What is
the advantage of this union/bitfield over the Hi-Tech standard header
declarations, like

  if( !RB5) PORTA = 0xaa;

?

(Of course I usually wouldn't use RB5 in such a context, but rather a
meaningful name that gets associated with RB5 in a header file. But the
question remains the same.)

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